HP-UX IP Address and Client Management Administrator's Guide (October 2009)

Table 1-10 Server Resource Limit Options
DescriptionOption
This option specifies maximum number of simultaneous recursive lookups
the server performs on behalf of the clients. The default value is 1000.
recursive-clients
This option specifies maximum number of simultaneous client TCP
connections that the server accepts. The default value is 100.
tcp-clients
This option specifies maximum amount of memory (in bytes) that a server’s
cache can use. When the amount of data in the cache reaches this limit, the
server causes the records to expire prematurely so that the limit is not
exceeded.
max-cache-size
This option specifies the length of the listen queue. The default and minimum
values are 3. If the kernel supports the dataready accept filter, this option
also controls the number of TCP connections that are queued in the kernel
space waiting for data before data is passed to the accept filter.
tcp-listen-queue number;
This option sets the maximum size for each journal file. When the journal file
approaches the specified limit, older transactions in the journal are
automatically removed. The default value is unlimited.
max-journal-size size_spec;
Periodic Task Interval Options
Table 1-11 describes the periodic task interval options.
Table 1-11 Periodic Task Interval Options
DescriptionOption
This option specifies (in minutes) how frequently the server removes the
expired resource records from the cache. The default value is 60 minutes. If
cleaning-interval is set to 0, periodic cleaning does not occur.
cleaning-interval number;
This option specifies how frequently the server scans the network interface
list (in minutes). If this option is set to 0, interface scanning occurs only when
the configuration file is loaded. After the scan, listeners are started on any
new interface (provided they are allowed by the listen-on configuration).
Listeners on interfaces that have expired are removed.
interface-interval number;
This option specifies how frequently the name server statistics are logged.
The default value is 60. If this option is set to 0, statistics are not logged.
statistics-interval number;
Tuning Options
Table 1-12 describes the tuning options.
Table 1-12 Tuning Options
DescriptionOption
This option sets the maximum time for which the server caches ordinary answers.
The default value is 1 week.
max-cache-ttl
The server stores negative answers to reduce network traffic and to increase
performance. max-ncache-ttl sets a maximum retention time (in seconds) for
these answers in the server.
max-ncache-ttl
This option specifies the number of days after which DNSSEC signatures that are
automatically generated due to dynamic updates expire. The default value is 30
days.
sig-validity- interval
This option sets the advertised Extended DNS (EDNS) UDP buffer size in bytes.
The valid values range from 512 to 4096 bytes (values outside this range are silently
adjusted). The default value is 4096.
edns-udp-size
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